Valve for internal-combustion engines.



V W. E; TAET. VALVE POB. INTERNAL GOMBUSTION ENGINES. MPLIGATI'ON FILED MAR. ze, 1912.

1,086,794. Patented Feb. 10, 1914.

1 Ry. Z

10'` vg/e b I 0 f L r im l/ N 71/ d ',1? f 0 l" L w 1 n me@ fz c sa l MW/ev R5- ?0 a l.

las I g//lb Mtnesses @25%,- f/ Mgg/ WALTER E. TAFT, OF PROVIDENCE, RHODE ISLAND.

VALVE FOR INTERNAL-COMBUSTION ENGINES.

`Specification. of Letters Eatent.

Patented Feb. MLLQML.

Appnuation filed March 29', 1912. semina. esalta.

To all whom it may concern.'

Be it known that I, lJVAL'I'ER E. TAFT, a citiof Rhode Island, have invented a new` and" useful Improvement in Valves for Internal- Combustion Engines, of which the following is a specification.

The object of my invention is to avoid liability of an explosion in the valve chamber, and. to provide a valve that is guarded against the great pressure due to the explosion of the gas in the cylinder of the engine, and is also provided with means for lessening the friction of its oscillating movement. In the accompanying drawing: Figure l is a transverse section of the valve and the valve chamber. Fig. 2 is a longitudinal section of the same. Fig. 3 is a perspective showing the chambers for receiving .the antifriction rollers. Fig. 4 is a pers ective view of the valve. Fig. 5 is a perspective view of vthe supplementary valve. 'Fig'. 6 is a perspective view of the lining for the vafive chamber, showin the seat for the 'suppiementary valve. Cv-Fig. 7 -is a transverse section showing a modication.

In the drawing, a represents the valve casing, b the oscillating the valve casing, which lining aords a complementary seat for the valve b.

d is the supplementary valve.

The valve casing a is provided with the Water passage e for cooling the said casing,

and with the port f, which may constitute either an inlet or an exhaust port as the case may be, and the lining c of the valve casing is also rovided with a port h, held in register Witi the said port f, and between Ythe said casing a, and the lining c is placed the supplementary valve d, which is connected for simultaneous movement with the valve b, by means of the pins j, y', which enter the holes fc, c, made in the said supplementary valve, the said pins crossing from one of tlie said valves to the other, through the slots l, Z,

f the lining o.

' mh ve b as shown in Fig. l, is iliade 'h the axis of the bore locate-d "the axis ofthe periphery, and

the said tube, whereby the Y caused to yield resiliently view of the lining for the valve chamber,

valve, c the lining of tudinal slot m made inthe under pressure. The lining o of the valve casing is provided -with openings fn., n, for the reception of the anti-friction rollers 0, o, which serve to provide means` for the prevention of excessive friction at the back of the valve, when the said valve is operating under heavypressure. VThe anti-friction rollers in this construction as well as in the construction next described, have their axes arranged parallel with the axis of the valve b.' l

A `modication of my invention is shown in Fig. 7 in which the ,valve b lis non resilient, and the anti-friction rollers o, o, are backed by means of a shoe p, which is resiliently held in its bearin position against the said rollers by means 0% thespiral spring Q and the adjusting screw r.

The supplementary valve d serves to `proi tect the inner valve bpfrom the effect of the excessive pressure of the explosion when the said valve is closed.

I claim as my invention:

1. An oscillating valve having a cylindrical comii mentary valve seat, and a plurality anti iction rollers-supported in the valve seat and hearing upon the valve and having their axes arranged parallel with the axis ofthe valve.'

2. A valve casing provided with a port for the passage of the motive fluid, a lining for the said casing, also provided with a port registering with the said port in the casing, a cylindricalvalve within the said lining, a supplementai valve located at the outer Aside of the said lining and having its seat thereon, and operatively connected with the said inner valve for simultaneous movement therewith.

3. A valve casing provided with a port for the passage of the motive luid, a lining for thesaid casing, also provided with 'a port adjustable spring' at the back of the bearing shoe.

4. 'A valve for internal combustion en gines, cainprising a easing, a lining, an oscil- .lat

rzean;

suppe-rted in said easing, and

-ng valve within said linnig, antifriction shoe at theV back of the said rollers, and an f means for allowing a yielding action of the valvn 1While retaining its position in #che lining.

5. A valve, including an inner vave, and

'In a suppsmentary valve, a, seat for the inner mln/e, esilent means to hold said inner miv@ to s seat, and n seat for Ehe supplewww@ menary Valve, said supplementary valve h ed to its seat by pressure of Explosion or Compression.

WALTER E. TAFT.

Witnesses SOCRATES SCHOLFIELD,

W. S. MAnsm 

